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Impossible Ultraviolet is a custom map series for StarCraft: Remastered, blending the punishing difficulty of classic Impossible Scenarios with rich RPG mechanics, randomized encounters, and deep hero customization. A spiritual successor to Impossible Cyrus, the UV series is designed for 1–6 players (5+ strongly recommended), offering immense replay value, strategic teamplay, and an ever-expanding universe of content.

• Current Entries: 4 complete, with UV 4 in active development and UV 5 planned
• Game Engine: StarCraft: Remastered
• Primary Genre: Impossible Scenarios / RPG Hybrid
• Gameplay Style: Co-op survival with escalating challenge, upgrade systems, and dozens of heroes
• Key Innovations:
  • Randomized enemy spawns for high replayability
  • Gateway for using skills and buying upgrades
  • Unique hero spells, upgrades, and ore economy
  • Unlockable content via game codes earned through victories
  • Tiered difficulty settings with scaling mechanics
  • Newer entries introduce deeper customization systems like STATS

• Map Size: 192×192 Jungle
• Missions: 5 + Final Boss Fight
• Heroes: 15 core + 6 secret (with custom spells and upgrades)
• Version: 1.23 (allowing obs to chat with players)
• Download: Impossible UV

Impossible Ultraviolet established the foundation of the series: unforgiving difficulty, persistent upgrades, and RPG-style hero development. Players select one of 15 unique heroes, build customized unit squads, and fight through randomized missions that ensure no two runs feel quite the same. Core concept is simple: destroy all Mature Crysalis that spawns enemy units periodically to reduce enemy advances and to go on to next stage.

Notable Features:

• Four difficulty levels, plus a hidden “Impossible+” mode
• Gas represents a hero's mana pool slowly regenerating over time
• Unlockable heroes and abilities through game codes
• Extensive spawn and event randomization
• Upgrade stations with simplified ore-only costs
• Mission rewards based on performance and team kill count
• Adaptive bonuses when fewer players are present

• Versions: UV2 1.04 and UV3 0.04
• Download: Impossible UV 2 & Impossible UV 3

UV 2 and UV 3 expand upon the core UV1 formula with new terrain, enemy compositions, and balance tweaks. They retain the same core mechanics but refine pacing, mission layouts, and player roles. Starting in UV2 some stages have invincible Mature Crysalis (or other buildings) that requires you to destroy a certain building (ex. Overmind) first to disable invincibility, adding to the difficulty. Ideal for veterans of UV1 looking to test their skills further on fresh maps. UV3 sees the introduction of buying minerals and random selection in shop, also it is the only current UV that does not contain boss level.

• Version: 0.42b
• Download: Impossible UV 4

UV 4 represents the largest leap forward in the series, introducing major systems and gameplay overhauls:

• STATS system: Each player now has attributes across five categories – Strength (melee damage), Tactics (ranged damage), Aptitude (magic damage), Tenacity (health armor), Speed (shield armor) – enabling more deliberate team compositions and diverse builds.
• Overhauled unit selection: Units are now purchasable in a shop style setup allowing for unique combinations not previously selectable
• New hero options with more complex spell kits and multiple upgrade paths
• Smarter difficulty scaling and tighter spawn randomization
• Streamlined UI and upgrade structure, with better hotkeys and cleaner layout

UV4 maintains the fast-paced, tactical challenge of previous entries but adds a new layer of strategy and experimentation. It’s designed to reward deep understanding of mechanics, team synergy, and flexibility under pressure. It is the longest map in the series to date with a grueling 7 missions and final boss fight. Due to this expansion, max player count has been reduced from 6 to 5 to make room for one additional enemy AI.

While still in conceptual stages, UV 5 is intended to return many features to the previous style including allowing for up to 6 players and having fewer missions for a less grueling experience, all while maintaining the advancements implemented in the UV 4 which have dramatically improved the quality of life of the experience.

Whether you're new to Impossible maps or a longtime UV veteran, this wiki is your hub for:

• Strategy guides
• Hero overviews
• Version changelogs
• Developer insights and patch notes

Dive in. Theorycraft. Experiment. And remember:
Teamwork is mandatory. Survival is optional.
Join our discord at uvmaps.net